An extraterrestrial visitor traversing our solar system had its closest encounter with Mars earlier this month, prompting two European robotic spacecraft orbiting the red planet to turn their attention towards it.
Dubbed 3I/ATLAS, this visitor hails from a different solar system within the galaxy. Originating as a comet, it was ejected from its parent star, possibly due to gravitational interactions with a massive planet like Jupiter. Drifting through interstellar space for billions of years, it was eventually pulled into our solar system by the gravitational pull of the sun. It is now passing through our system before embarking on its eternal journey, never to return.
Interestingly, the trajectory of this comet indicates that it could be the oldest comet ever detected, potentially predating our own 4.6 billion-year-old solar system.
While the object will not pose a threat to Earth, it passed within 30 million kilometers of Mars on October 3. Positioned advantageously, the European Space Agency’s robots orbiting Mars, ExoMars and Mars Express, captured images of 3I/ATLAS, revealing a fuzzy spherical shape with a short tail, characteristic of a comet releasing ices and dust as they are warmed by the sun.
Further examinations following its closest approach to the sun on October 30 will shed light on the composition of these icy materials and whether they resemble the comets within our solar system.
This marks the third instance of an interstellar object traversing our solar system, following 1I/Oumuamua in 2017 and 2I/Borisov in 2019. Each appearance of these foreign objects sparks speculation about the possibility of alien spacecraft passing through, either disinterested in us or potentially bearing a cryptic message, echoing themes from the 1973 science fiction novel “Rendezvous With Rama.”
